Boron tribromide

  • Tribromoborane
  • Boron bromide
  • Boron(III) bromide
Formula
BBr3
Structure
Description
Colorless, fuming liquid with a sharp, irritating odor.
Uses
Manufacture of diborane.

Registry Numbers and Inventories.
CAS
10294-33-4
EC (EINECS/ELINCS)
233-657-9
EC Index Number
005-003-00-0
EC Class
Reacts violently with water; Very toxic; Corrosive
R 14 26/28 35 40
S 9 26 28 36/37/39 45
RTECS
ED7400000
RTECS class
Other
UN (DOT)
2692
Merck
13,1337
Beilstein/Gmelin
2173 (G)
Swiss Giftliste 1
G-7030
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
BBr3
Formula mass
250.54
Melting point, °C
-46
Boiling point, °C
91.2
Vapor pressure, mmHg
61 (25 C)
Vapor density (air=1)
8.6
Critical temperature
300
Density
2.645 g/cm3 (20 C)
Solubility in water
Decomposes
Viscosity
0.731 cp (20 C)
Surface tension
29.1 g/s2
Refractive index
1.00207
Dielectric constant
4.31
Partition coefficient, pKow
3.61
Heat of fusion
3.1 kJ/mol
Heat of vaporization
31.4 kJ/mol

Hazards and Protection.
Storage
Do not store in direct sunlight. Store in a tightly closed container. Keep under a nitrogen blanket. Store in a cool, dry, well-ventilated area away from incompatible substances. Poison room locked.
Handling
Wash thoroughly after handling. Wash hands before eating. Use only in a well ventilated area. Avoid breathing dust, vapor, mist, or gas. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Do not ingest or inhale.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Clean up spills immediately, using the appropriate protective equipment. Provide ventilation.
Disposal code
24
Stability
Stable under normal temperatures and pressures. Reacts with water to form toxic fumes.
Incompatibilities
Acids, alcohols, alkali metals, steel, and water.
Decomposition
Carbon monoxide, carbon dioxide, hydrogen bromide, oxides of boron.

Fire.
Flash Point,°C
-18
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. To extinguish fire use water spray, dry chemical, carbon dioxide, or chemical foam.
Fire potential
Not flammable
Hazards
Vapors may accumulate in confined areas (basement, tanks, hopper/tank cars, etc.). Substance will react with water (some violently), releasing corrosive and/or toxic gases. Reaction with water may generate much heat which will increase the concentration of fumes in the air. Contact with metals may evolve flammable hydrogen gas.
Combustion products
Toxic fumes of the chemical or hydrogen bromide may form in fires.
Health
3
 
Flammability
0
 
 
Reactivity
2
 
 
Special
W

Health.
Exposure limit(s)
TLV: 1 ppm; 10 mg/m3 as CEILING (ACGIH 1993-1994). NIOSH REL: C 1 ppm (10 mg/m3)
Poison_Class
2
Exposure effects
Significant ingestions or dermal exposures can be associated with weak, rapid pulse, cyanosis and abnormally low blood pressure. The patient may present with reduced body temperature, elevated body temperature or normal body temperature. Headache, lethargy, restlessness, weakness, CNS irritation, and/or seizures may occur with long term or repeated exposures. There is insufficient information concerning the reproductive effects of borates in humans. Adverse testicular effects and infertility have been reported in animals. <br>There have been limited animal studies which suggest decreased ovulation, fetotoxicity and developmental defects may occur with very high exposure levels. Maternal toxicity was present in some studies.
   Ingestion
Causes gastrointestinal tract burns. Causes severe pain, nausea, vomiting, diarrhea, and shock.
   Inhalation
Causes severe irritation of upper respiratory tract with coughing, burns, breathing difficulty, and possible coma. Causes chemical burns to the respiratory tract. Inhalation may be fatal as a result of spasm, inflammation, edema of the larynx and bronchi, chemical pneumonitis and pulmonary edema.
   Skin
Causes skin burns.
   Eyes
Causes eye burns.

First aid
 
   Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If breathing is difficult, give oxygen. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.
   Skin
Get medical aid. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Discard contaminated clothing in a manner which limits further exposure. Destroy contaminated shoes.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed. Extensive irrigation is required (at least 30 minutes).

Transport.
UN number
2692
Response guide
Hazard class
8
PRTC
T
Packing Group
I
 
USCG CHRIS Code
BTB
 
HS Code
2812 90 00
 
Std. Transport #
4932010